Crack Surveys of Low-Cracking High-Performance Concrete Bridge Decks in Kansas 2009-2010
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Issue Date
2011-10Author
Pendergrass, Benjamin
Darwin, David
Browning, JoAnn
Publisher
University of Kansas Center for Research, Inc.
Type
Technical Report
Is part of series
SL Report;11-3
Published Version
https://iri.ku.edu/reportsMetadata
Show full item recordAbstract
The specifications for the construction of Low-Cracking High-Performance Concrete (LC-HPC) bridge decks are summarized and the survey procedure used for analysis of cracking performance of bridge decks is described. Thirteen LC-HPC decks and thirteen control decks were evaluated using the survey procedure. Crack densities were calculated and crack locations marked. LC-HPC bridge decks have significantly lower crack densities than do the control bridge decks. The majority of cracks develop in the transverse direction, directly above and parallel to the reinforcing steel. Longitudinal cracks often propagate from the abutments. The results suggest that crack densities will increase on the upper portions of superelevated decks due to increased settlement cracking caused by the use of high slump concrete and less than optimum curing when water is not directly supplied to the superelevated side of the deck. Overfinishing of concrete by means of a double-drum roller screed may increase cracking by increasing the amount of cement paste at the deck surface.
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Citation
Pendergrass, B., Darwin, D., and Browning, J., "Crack Surveys of Low-Cracking High-Performance Concrete Bridge Decks in Kansas 2009-2010", SL Report 11-3, University of Kansas Center for Research, Inc., Lawrence, Kansas, October 2011, 106 pp.
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